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  • Title: Development of a molecular assay specific for the Leishmania donovani complex that discriminates L. donovani/Leishmania infantum zymodemes: a useful tool for typing MON-1.
    Author: Haralambous C, Antoniou M, Pratlong F, Dedet JP, Soteriadou K.
    Journal: Diagn Microbiol Infect Dis; 2008 Jan; 60(1):33-42. PubMed ID: 17889482.
    Abstract:
    We have developed a simple, rapid, sensitive, and cost-effective typing method, based on the amplicon size of the K26 gene, capable of species/strain discrimination of Leishmania donovani complex strains causing visceral leishmaniasis (VL). It was evaluated on 112 strains and compared with multilocus enzyme electrophoresis (MLEE) typing. The K26 polymerase chain reaction (PCR) applied on 26 representative L. donovani complex strains gave 14 different amplicon sizes. The assay was specific to the L. donovani complex and discriminated L. infantum from L. donovani strains. MON-1 strains were also easily distinguished from other non-MON-1. Surprisingly, 29.3% of the Greek strains included in this study were MLEE typed as MON-98 and gave exclusively a 940-bp amplicon. The majority of Greek MON-1 strains gave also the 940-bp amplicon, whereas a 626-bp amplicon was consistently obtained with other European MON-1 strains. K26 PCR-restriction fragment length polymorphism, based on MON-1 K26 sequence polymorphism, gave 2 MON-1 subgroups. Application of the method may contribute to efficiently monitor VL.
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